[rdrnws]

I have been trying to source replacement drivers (new) for a pair of Bose
901 series 4. I would appreciate any technical info on the specifications of
the original ones. What is their ohm impedence? Can someone recommend
replacement models and types? TIA,

Nikolas

[Mr.T]

"rdrnws" wrote in message
...
I have been trying to source replacement drivers (new) for a pair of Bose
901 series 4. I would appreciate any technical info on the specifications
of
the original ones. What is their ohm impedence? Can someone recommend
replacement models and types? TIA,

Have you tried Bose?

MrT.

[Peter Larsen]

rdrnws wrote:

I have been trying to source replacement drivers (new) for a
pair of Bose 901 series 4. I would appreciate any technical
info on the specifications of the original ones. What is their
ohm impedence? Can someone recommend replacement models and
types? TIA,

Why do you need new drivers?

Nikolas


Peter Larsen

[Eeyore]

rdrnws wrote:

I have been trying to source replacement drivers (new) for a pair of Bose
901 series 4. I would appreciate any technical info on the specifications of
the original ones. What is their ohm impedence? Can someone recommend
replacement models and types? TIA,

I'm not aware of anything identical.

Why not get your existing ones reconed ?

Graham

[Laurence Payne]

On Tue, 19 Dec 2006 13:32:16 +0200, "rdrnws" wrote:

I have been trying to source replacement drivers (new) for a pair of Bose
901 series 4. I would appreciate any technical info on the specifications of
the original ones. What is their ohm impedence? Can someone recommend
replacement models and types? TIA,

You can get them from Bose.

[rdrnws]

"Laurence Payne" lpayne1NOSPAM@dslDOTpipexDOTcom wrote in message
...
You can get them from Bose.

At $100 each it is just not practical to do so. The price quoted above is
purely marketing. The oem drivers are mass-production below-average quality
drivers.

Nikolas

[Peter Larsen]

rdrnws wrote:

"Laurence Payne" lpayne1NOSPAM@dslDOTpipexDOTcom wrote in message
...
You can get them from Bose.

At $100 each it is just not practical to do so.

And now please tell us what is wrong them!


Peter Larsen


The price quoted above is
purely marketing. The oem drivers are mass-production below-average quality
drivers.

Nikolas

[GregS]

In article , "rdrnws" wrote:
"Laurence Payne" lpayne1NOSPAM@dslDOTpipexDOTcom wrote in message
.. .
You can get them from Bose.

At $100 each it is just not practical to do so. The price quoted above is
purely marketing. The oem drivers are mass-production below-average quality
drivers.

Nikolas



The last time I bought one was about 20 years ago. They were $40 ea
from a distributor. $100 might not be too bad, but they are supposed
to find cheapr units from China nowdays.

The 1 inch flat aluminum wire voice coil with about 1 ohm Z and 10 oz. magnet,
is probably imposible to get elewhere. One could use some other units and
rewire the box and retune it using some other impedance rating driver. The
hole mounting pattern is also the 3 hole type. Would probably have to drill
holes, but how do you screw into plastic? The drivers are also rather stiff
suspension wise, designed for ported apps., compared to the air spring of the
series 1 and 2.

greg

[GregS]

In article , (GregS) wrote:
In article , "rdrnws" wrote:
"Laurence Payne" lpayne1NOSPAM@dslDOTpipexDOTcom wrote in message
. ..
You can get them from Bose.

At $100 each it is just not practical to do so. The price quoted above is
purely marketing. The oem drivers are mass-production below-average quality
drivers.

Nikolas



The last time I bought one was about 20 years ago. They were $40 ea
from a distributor. $100 might not be too bad, but they are supposed
to find cheapr units from China nowdays.


$40 in 1985 would be $70 now.

greg

The 1 inch flat aluminum wire voice coil with about 1 ohm Z and 10 oz. magnet,
is probably imposible to get elewhere. One could use some other units and
rewire the box and retune it using some other impedance rating driver. The
hole mounting pattern is also the 3 hole type. Would probably have to drill
holes, but how do you screw into plastic? The drivers are also rather stiff
suspension wise, designed for ported apps., compared to the air spring of the
series 1 and 2.

greg

[Mr.T]

"GregS" wrote in message
...
$40 in 1985 would be $70 now.

I think you better check the official inflation figures and re-do your
calculations.
Or at least tell us how the hell you came up with that figure?

MrT.

[Geoff]

rdrnws wrote:
"Laurence Payne" lpayne1NOSPAM@dslDOTpipexDOTcom wrote in message
...
You can get them from Bose.

At $100 each it is just not practical to do so. The price quoted
above is purely marketing. The oem drivers are mass-production
below-average quality drivers.


We all know that. But you pays yer money and makes yer choice.

geoff

[Mr.T]

"Geoff" wrote in message
...
At $100 each it is just not practical to do so. The price quoted
above is purely marketing. The oem drivers are mass-production
below-average quality drivers.

We all know that. But you pays yer money and makes yer choice.

Absolutely, the real question though is if he knew that, why the hell did he
buy them in the first place?

MrT.

[Eeyore]

"Mr.T" wrote:

"Geoff" wrote in message

At $100 each it is just not practical to do so. The price quoted
above is purely marketing. The oem drivers are mass-production
below-average quality drivers.

We all know that. But you pays yer money and makes yer choice.

Absolutely, the real question though is if he knew that, why the hell did he
buy them in the first place?

No highs, no lows, it must be Bose !

Graham

[Eeyore]

rdrnws wrote:

I have been trying to source replacement drivers (new) for a pair of Bose
901 series 4. I would appreciate any technical info on the specifications of
the original ones. What is their ohm impedence? Can someone recommend
replacement models and types? TIA,

http://cgi.ebay.co.uk/For-BOSE-802-9...QQcmdZViewItem

Any use ?

Graham

[GregS]

In article , Eeyore wrote:


rdrnws wrote:

I have been trying to source replacement drivers (new) for a pair of Bose
901 series 4. I would appreciate any technical info on the specifications of
the original ones. What is their ohm impedence? Can someone recommend
replacement models and types? TIA,

http://cgi.ebay.co.uk/For-BOSE-802-9...peaker-NEW_W0Q
QitemZ180065503112QQihZ008QQcategoryZ3278QQssPage NameZWDVWQQrdZ1QQcmdZViewItem

Any use ?


It could replace series I, II, but its not the 4 mounting hole type. They are
not the 8 ohms required though. They would probably fit the new enclosures.

Interesting, the orginal 4 1/2 inch driver is specified demensions between
mounting holes of 4 1/2 inches. The 3 hole mounting would not be 4 1/2 inches.

If this guy is realy serious about replacing drivers, he should buy a used set
thats capable of having the drivers refoamed.

greg

[Peter Larsen]

GregS wrote:

If this guy is realy serious about replacing drivers, he should
buy a used set thats capable of having the drivers refoamed.

He has still not told us why he wants new drivers. Allow me to suggest
getting that information first prior to trying to solve his problem,
perhaps all he needs is to get the one he has refoamed.

greg


Peter Larsen

[GregS]

In article , Peter Larsen wrote:
GregS wrote:

If this guy is realy serious about replacing drivers, he should
buy a used set thats capable of having the drivers refoamed.

He has still not told us why he wants new drivers. Allow me to suggest
getting that information first prior to trying to solve his problem,
perhaps all he needs is to get the one he has refoamed.

greg


Sometimes if dropped, some of the magnets fall off.

greg

[Eeyore]

GregS wrote:

In article , Eeyore wrote:


rdrnws wrote:

I have been trying to source replacement drivers (new) for a pair of Bose
901 series 4. I would appreciate any technical info on the specifications of
the original ones. What is their ohm impedence? Can someone recommend
replacement models and types? TIA,

http://cgi.ebay.co.uk/For-BOSE-802-9...peaker-NEW_W0Q
QitemZ180065503112QQihZ008QQcategoryZ3278QQssPage NameZWDVWQQrdZ1QQcmdZViewItem

Any use ?

It could replace series I, II, but its not the 4 mounting hole type. They are
not the 8 ohms required though. They would probably fit the new enclosures.

Interesting, the orginal 4 1/2 inch driver is specified demensions between
mounting holes of 4 1/2 inches. The 3 hole mounting would not be 4 1/2 inches.

If this guy is realy serious about replacing drivers, he should buy a used set
thats capable of having the drivers refoamed.

I found the foams on ebay too.

Graham

[Rayvan]

rdrnws wrote:
I have been trying to source replacement drivers (new) for a pair of Bose
901 series 4. I would appreciate any technical info on the specifications of
the original ones. What is their ohm impedence? Can someone recommend
replacement models and types? TIA,

Nikolas

If it's foam rot, you can buy new foam kits.

I've re-foamed an older pair of JBL speakers and they turned out great.
The kit cost about 20 bux for the two woofers and it took only a couple
of hours. For 901s You'll be busy for a while! :-)
--
Rayvan